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Revenue Recognition - Revenues by Primary Geographical Markets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 573,627 | $ 596,968 | $ 1,783,937 | $ 1,766,689
Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 235,490 | 234,274 | 747,303 | 706,273
Ecoproducts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 36,663 | 43,841 | 107,190 | 122,747
Environmental systems for aluminum dross and scrap processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 6,995 | 7,762 | 16,703 | 19,639
Railway Track Maintenance Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 19,099 | 24,531 | 79,535 | 98,771
After-market Parts and Services; Safety and Diagnostic Technology |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 23,495 | 31,310 | 89,502 | 93,633
Railway Contracting Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 15,094 | 16,539 | 44,778 | 33,876
Hazardous waste processing solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 194,557 | 194,927 | 581,341 | 578,545
Soil and dredged materials processing and reuse solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 42,234 | 43,784 | 117,585 | 113,205
North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 338,751 | 367,561 | 1,066,598 | 1,094,301
Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 130,003 | 129,767 | 389,922 | 363,035
Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 38,442 | 45,051 | 125,601 | 129,351
Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 35,836 | 26,851 | 108,766 | 102,710
Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 26,327 | 22,673 | 79,858 | 62,195
Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 4,268 | 5,065 | 13,192 | 15,097
Operating Segments | Harsco Environmental Segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 279,148 | 285,877 | 871,196 | 848,659
Operating Segments | Harsco Environmental Segment | Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 235,490 | 234,274 | 747,303 | 706,273
Operating Segments | Harsco Environmental Segment | Ecoproducts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 36,663 | 43,841 | 107,190 | 122,747
Operating Segments | Harsco Environmental Segment | Environmental systems for aluminum dross and scrap processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 6,995 | 7,762 | 16,703 | 19,639
Operating Segments | Harsco Environmental Segment | Railway Track Maintenance Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | After-market Parts and Services; Safety and Diagnostic Technology |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | Railway Contracting Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | Hazardous waste processing solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | Soil and dredged materials processing and reuse solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 70,316 | 78,528 | 238,553 | 238,617
Operating Segments | Harsco Environmental Segment | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 108,709 | 109,473 | 328,604 | 318,177
Operating Segments | Harsco Environmental Segment | Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 38,195 | 44,351 | 122,396 | 127,486
Operating Segments | Harsco Environmental Segment | Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 31,333 | 25,787 | 88,593 | 87,087
Operating Segments | Harsco Environmental Segment | Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 26,327 | 22,673 | 79,858 | 62,195
Operating Segments | Harsco Environmental Segment | Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 4,268 | 5,065 | 13,192 | 15,097
Operating Segments | Clean Earth Segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 236,791 | 238,711 | 698,926 | 691,750
Operating Segments | Clean Earth Segment | Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Ecoproducts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Environmental systems for aluminum dross and scrap processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Railway Track Maintenance Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | After-market Parts and Services; Safety and Diagnostic Technology |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Railway Contracting Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Hazardous waste processing solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 194,557 | 194,927 | 581,341 | 578,545
Operating Segments | Clean Earth Segment | Soil and dredged materials processing and reuse solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 42,234 | 43,784 | 117,585 | 113,205
Operating Segments | Clean Earth Segment | North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 236,791 | 238,711 | 698,926 | 691,750
Operating Segments | Clean Earth Segment | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Clean Earth Segment | Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 57,688 | 72,380 | 213,815 | 226,280
Operating Segments | Harsco Rail Segment | Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Ecoproducts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Environmental systems for aluminum dross and scrap processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Railway Track Maintenance Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 19,099 | 24,531 | 79,535 | 98,771
Operating Segments | Harsco Rail Segment | After-market Parts and Services; Safety and Diagnostic Technology |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 23,495 | 31,310 | 89,502 | 93,633
Operating Segments | Harsco Rail Segment | Railway Contracting Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 15,094 | 16,539 | 44,778 | 33,876
Operating Segments | Harsco Rail Segment | Hazardous waste processing solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Soil and dredged materials processing and reuse solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  |  | 0 | 0
Operating Segments | Harsco Rail Segment | North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 31,644 | 50,322 | 129,119 | 163,934
Operating Segments | Harsco Rail Segment | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 21,294 | 20,294 | 61,318 | 44,858
Operating Segments | Harsco Rail Segment | Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 247 | 700 | 3,205 | 1,865
Operating Segments | Harsco Rail Segment | Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 4,503 | 1,064 | 20,173 | 15,623
Operating Segments | Harsco Rail Segment | Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 0 | $ 0 | $ 0 | $ 0

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